Warmblooded animals live an active life even in freezing winter，which helps them to________their normal body temperature.[ ]

hard you try, it is difficult to lose weight without cutting down the amount you eat.

The director made the demand that she __________ the dangerous place as soon as possible.

I’m worrying about the coming examinationI’m afraid I cannot pass it—________！I’m sure you’ll make it

The process of curing a disease is like awar ___ different soldiers fight against an enemy